Retort smoke-abater.



O. D. ORVIS. RETORT SMOKE ABATER. APPLICATION FILED MAY 14, 1912.

Patented Apr. 1, 1913.

2 SHEETS-SHEET 1.

COLUMBIA PLANOGRAPH C0 WASHINGTON. D. c.

O. D. ORVIS. RETORT SMOKE ABATER. APPLICATION FILED MAY 14, 1912.

1,058,014. Patented Apr. 1, 1913; v

2 SHEETS-SHEET 2.

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. cOLuMBlA PLANOGRAPH C0-,\vAsmNuTON. D C

" UNITED STATES PATENT OFFICE.

03m. 1). ORVIS, on NEW YORK, N. Y., ASSIGNOR To HENRY GALLAGHER, or NEwYORK, N. Y.

RETORT SMOKE-ABATER.

Specification of Letters Patent.

Patented Apr. 1, 1913.

Application filed May 14, 1912. Serial No. 697,165.

T0 all whom it may concern Be it known that I, OREL D. ORVIS, a citizenof the United States, and a resident of New York, in the county of NewYork and State of New York, have invented certain new and usefulImprovements in Retort Smoke-Abaters, of which the following is aspecification.

This invention relates to improvements in steam boiler furnace, andparticularly to that class in which air is directed into the products ofcombustion for the purpose of securing practically complete combustion,improving the draft and increasing economy in fuel consumption. Itsobjects are, first,to obtain the foregoing results and in addition, to

provide against smoke emanation and increase the efficiency of theboiler. Second, to sofarrange the several parts that they may be appliedto boilers already in use without material difficulty, as well as newinstallation; and third, to so arrange the parts as to maintain them ineffective operation for an indefinite period of time, they beingprotected from the intense heat generated by furnaces of this class.These and other objects are obtained by the peculiar construction andarrangement of parts hereinafter described and shown in the accompanyingdrawings, forming part of this specification, and in which Figure 1 is aside elevation of the front portion of a boiler, to which my inventionhas been applied, parts being broken away to show the interior.sectional view, taken on line 22 of Fig. 1. Fig. 3 is a similarsectional view, taken on line 33 of Fig. 1. Fig. 1 is a like trans versesectional view, taken on line H of i Fig. 1. Fig. 5 is a transversesectional view, illustrating, in detail, the method used in incasing thepipes disposed within the furnace, and, Fig. 6 is a fragmentarysectional view, taken on line 6-6 of Fig. 1.

In order to describe this invention intelligibly, it is considereddesirable to illusthat a clear understanding of the relation between thedevice and the fire box may be readily obtained.

From the drawings, it will be seen that few changes need be made inadapting this device to ordinary fire boxes or furnaces,

' that no extra expense is involved in its op- Fig. 2 is a transverseeration and that no exterior space is required for its erection.

Whatever may bethe natureof the fuel used, be it anthracite orbituminous coals, crude oils or other substances rich in hydrocarbons orheat-giving properties, all give oifwhen consumed, various gases,intimately mixed with atoms of unconsumed matter forming what isgenerally termed smoke. In ordinary fire boxes such smoke is caused tocommingle with the heat from the fire, pass to such parts as it isdesirable to heat, where some of the heavier particles may findlodgment, and the remainder be dissipated in the atmosphere. Not only isthe air rendered unfit for natural purposes in the immediate vicinity,but such smoke in the form of flaky, oily particles is carriedfrequently to considerable distances, befouling whatever it may finallysettle upon. Aside, however, from the difiiculty with ordinary fireboxes, with either natural or forced draft, is anotherserious'consideration, that is, the loss of a large proportion of theheat element-s in the fuel used. WVhatever may be the nature of thecombustible used, certain heat-giving particles are driven off beforebeing consumed, creating a very considerable loss of combustible matter.As before stated, these particles are entrained with theproducts ofcombustion and the course of their movement from the fire box may bedescribed as rolling or billowy, the heavier particles graduallydescending by gravity and the entire volume keeping in a pathwaypractically central with the walls of the furnace as they rollrearwardly in their approach to the discharge flue.

The invention may be used in connection with any type of boiler or otherfurnace,

: one of the ordinary tubular style of boilers being indicated by thenumeral 10, resting on brick settings 11, and 12, at either side;

, within the furnace are the usual grate bars 13, extending from thefront 14 to the bridgewall 15 over the ash pit 16. trate itsapplication. to fire boxes, in order i }to decrease the throat or smokeoutlet at the bridgewall by a single course of fire brick 17, from thegrate surface to a point iabout level with the bottom of the boiler Forreasons above stated it is preferred shell and then further narrow theopening tracts the smoke passage and also afi'ords adequate protectionto parts embedded therein, as will afterward be described.

At one side of the brick work or furnace wall 11, is a flange 19, havingan opening in which is secured a pipe 20, extending inwardly through thewall and nearly to the middle of the fire box, at a point slightly infront of the bridgewall, and immediately below the boiler shell 10.Surrounding the pipe 20, and including an open space 21, is another pipe22, extending from the inside of the flange 19, across the fire box andinto the opposite wall 12; this latter pipe 22 is incased in a coveringof non-conducting material, as magnesia or asbestos 24, outside of whichis a protective tube 25, extending between the furnace walls andinclosed in a strong cylinder of terra-cotta, fire clay or likerefractory substances 26. On the pipe 22 and within the brick wall 11 isa T 27, while within the opposite wall 12, at the end of the pipe 22, isan elbow 28, both T and elbow having in their up-turned openings,vertical pipes which extend to a point above the furnace walls and inturn connect with elbow 31 extending rearwardly and having short nipples32, entering one end of T 33 in the opposite opening of which are pipes34: having enlarging thimbles 35 and in which are secured mufliers orair intakes 36, arranged with baffle plates or other silencing devicesto muffle or reduce the noise of incoming air. These mufiiers 36 aredisposed on the top of the furnace walls parallel to the boiler shelland are adapted to receive air as it is drawn in by steam jets 37controlled by cocks 38 and entering the Ts 33 between the two maininlets and in register with the third opening in which are pipes 10extending down in the brick walls to a point level with the bottom ofthe boiler shell where they are connected to angularly disposed pipes11, set in the brick work, at the sides of the bridgewall 15. Thesepipes ll are provided with a number of short blast pipes 42 branchingoff toward the center of the furnace, facing each other, and are adaptedto deliver streams of hot air on the smoke and other products ofcombustion as they pass over the bridgewall.

In order to insure a current of air at the center of the bridgewallunder boilers of large diameter, where the distance between the sidewalls might be too great for the side blasts to reach, there is provideda pipe 17, located within the space 21 and in alinement with the pipe20; the pipe 4;? has an elbow L8, connecting with a branch 49 extendingfrom the large elbow 50, between the blast pipes 1O and 41, the elbow 48being within the large elbow 28; at the other end of the pipe 47 isanother small elbow 51 in which is a short blast pipe adapted to deliveran air current rearwardly through the opening cial form of tiling 44-,made of refractory material, in sections for convenience in installing;the rear portion of the brldgewall has sectional tiling 45 of the samematerial,

but formed into a semi-circular shape, hav

ing an open, vertically disposed front, while the rounded rear portionis provided with apertures 54, adapted to discharge rearwardly a portionof the air blast received from the lowermost of the small blast pipes12. The upper tiles 45 have at their adjoining edges, vertical bars 55,made of the same refractory material, which serve to support and unitethe several sections.

The operation of the invention is as follows :--The fire having beenstarted, the operator admits steam to nozzle 37 and the velocity of thesteam current admitted to pipe 40, induces air to How through themuffler 36 and pipe 20 into pipe 40. The

steam and blast commingle in the pipes and are delivered under pressurefrom the small blast pipes 12, across the upper part of throat or spaceover the top of the bridgewall. The blasts of steam and air are directedinto the escaping products of combustion so as to secure two primaryends, namely; to break up the smoke and supply oxygen thereto, for thepurpose of consuming the carbon therein, and to increase the draftthrough the furnace chamber and the escape flue. By supplying the blastsover the briclgewall and above the throat, the air and other gases inthe throat are rarefied, or as it might be termed, a partial vacuum isproduced therein, the air and products of combustion being forciblydrawn around the lower edge of the arch, thus securing the increaseddraft referred to. The blasts op erate, furthermore, to draw theproducts of combustion forcibly into the throat so that they willimpinge upon the curved breast 45 which in a measure reflects the gasesagainst the arch from which the gases rebound. The arch and the breastbeing composed of vitreous tiles, they will become heated to a white orred heat, and the products of combustion impinging against these heatedsurfaces, it follows that thorough combustion of gases is secured, thusresulting in an in creased number of heat units being utilized.

Having thus described my invention, what I claim as new and desire tosecure by Letters Patent is 1. In a smoke consuming furnace, a fireboxand bridge-wall a portion of the top surface of which slopes smoothlydownward to the front, blast pipes within the side walls of the firebox, blast outlets connected with said blast pipes in such manner as todirect currents of air toward the center of the space angularly abovethe bridge-wall, a pair of muflled intakes arranged exteriorly of thefurnace walls, a single intake disposed above the fire box and in frontof the bridge-wall, connections between the last named intake and saidblast pipes and means combined therewith for producing a current of airwithin.

2. A smoke consuming furnace, comprising a combustion chamber and abridgewall having a smooth surface sloping downward toward the front,hollow semi-circular tile sections arranged on the top of saidbridge-wall at the rear thereof, the inner concave sides facing thecombustion chamber, said tiles having openings directed to the rear andmeans for producing an air blast therethrough.

3. A smoke consuming furnace, compris-- ing a fire-box, a bridge-walland other operative elements having combined therewith an air intakeopen to the atmosphere at one end, extending substantially to the centerof said fire-box above the normal fire surface, immediately in front ofsaid bridge-wall, a plurality of heat resisting casings, includ ing anopen annular space, inclosing said intake extending entirely across thefire-box and means for inducing an air current in said intake and fordischarging the same rearwardly above the said bridge-wall.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

OREL D. ORVIS.

Witnesses:

F. G. HENRY J 0s. A. KARL.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. C.

